Sync Channels window with device/channel changes

- Remove redundant Signals tab from Channels window; PipelineTab is now direct content
- PipelineTab removes stale blocks when devices are removed or reconfigured
- Devices>Signals tab refreshes automatically on device add/remove/configure
- Channel name and unit edits in Devices>Signals propagate live to Channels pipeline block headers; missing blocks auto-added if channel is enabled

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 12 insertions, 3 deletions

diff --git a/ui/windows/devices_window.py b/ui/windows/devices_window.py
index 8f6a48b..f942552 100644
--- a/ui/windows/devices_window.py
+++ b/ui/windows/devices_window.py
@@ -118,7 +118,9 @@ class DeviceRow(QFrame):
 class ChannelsTab(QWidget):
     """Shows all channels across all devices in an editable table."""
 
-    channel_visibility_changed = pyqtSignal(str, str, bool)  # dev_id, ch_id, enabled
+    channel_visibility_changed = pyqtSignal(str, str, bool)   # dev_id, ch_id, enabled
+    channel_name_changed       = pyqtSignal(str, str, str)     # dev_id, ch_id, name
+    channel_unit_changed       = pyqtSignal(str, str, str)     # dev_id, ch_id, unit
 
     # Col indices
     _C_DEVICE  = 0
@@ -228,8 +230,10 @@ class ChannelsTab(QWidget):
             return
         if col == self._C_NAME:
             ch.name = self._table.item(row, self._C_NAME).text()
+            self.channel_name_changed.emit(dev_id, ch_id, ch.name)
         elif col == self._C_UNIT:
             ch.unit = self._table.item(row, self._C_UNIT).text()
+            self.channel_unit_changed.emit(dev_id, ch_id, ch.unit)
         elif col == self._C_MIN:
             try:
                 ch.min_value = float(self._table.item(row, self._C_MIN).text())
@@ -247,6 +251,8 @@ class DevicesWindow(QWidget):
     device_removed             = pyqtSignal(str)
     device_reconfigured        = pyqtSignal(str)
     channel_visibility_changed = pyqtSignal(str, str, bool)  # dev_id, ch_id, enabled
+    channel_name_changed       = pyqtSignal(str, str, str)   # dev_id, ch_id, name
+    channel_unit_changed       = pyqtSignal(str, str, str)   # dev_id, ch_id, unit
     closed                     = pyqtSignal()
 
     def __init__(self, registry: DeviceRegistry, engine: AcquisitionEngine, parent=None):
@@ -305,7 +311,9 @@ class DevicesWindow(QWidget):
         # Tab 2: Channels
         self._ch_tab = ChannelsTab(self.registry)
         self._ch_tab.channel_visibility_changed.connect(self.channel_visibility_changed)
-        tabs.addTab(self._ch_tab, "  Channels  ")
+        self._ch_tab.channel_name_changed.connect(self.channel_name_changed)
+        self._ch_tab.channel_unit_changed.connect(self.channel_unit_changed)
+        tabs.addTab(self._ch_tab, "  Signals  ")
         tabs.currentChanged.connect(lambda i: self._ch_tab.refresh() if i == 1 else None)
 
     def refresh(self):
@@ -318,6 +326,7 @@ class DevicesWindow(QWidget):
             row.remove_clicked.connect(self._on_remove)
             self._inner.insertWidget(self._inner.count() - 1, row)
             self._rows[dev.info.device_id] = row
+        self._ch_tab.refresh()
 
     def _refresh_status(self):
         for row in self._rows.values():
@@ -340,7 +349,7 @@ class DevicesWindow(QWidget):
         dev = self.registry.get_instance(device_id)
         if dev:
             DeviceConfigDialog(dev, self).exec()
-            # Signal that device config may have changed (backend/simulate/port)
+            self._ch_tab.refresh()
             self.device_reconfigured.emit(device_id)
 
     def _on_remove(self, device_id: str):